Tyndall, John, 1820-1893 · New York, D. Appleton · leaf 104
ltaic batteries of ten cells each are now before leoi. in. HEAT OP THE VOLTAIC BATTERY. 79 you. I unite the two ends of one of them by a thickcopper wire, as in fig. 28. Midway in the circuit of theother battery I introduce four inches of thin platinumwire ; the currents flow through both circuits.… … that enables the copper wire to transmit the current with-out heating. Were it as thin as the platinum wire,though more warmed than it now is, it would fall far shortof a red heat. The copper is what we call a good con-ductor, the platinum a bad conductor ; the resistance of thelatter being…
Heat
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